01476127

Component

https://doi.org/10.3141/2371-10

http://scholar.google.com...ahia&publication_year=2013

The disconnect between estimated compaction temperatures on the basis of viscosity and behavior observed in laboratory- and field-compacted mixes indicates that the sole use of viscosity is insufficient to characterize the role of the asphalt binder in mixture compaction. The asphalt lubricity test was presented as a complement or replacement to viscosity on the basis of the concept that it was necessary to measure the properties of binders in thin films to relate better to compaction of mixes and to detect the effects of warm-mix asphalt (WMA) additives. To assess the value of the asphalt lubricity test, the relative contributions of lubricity, viscosity, and aggregate gradation on mixture workability at different levels of compactive effort were studied with statistical analysis. The mixes included fine and coarse gradations prepared with various conventional and WMA-modified binders, compacted at a range of temperatures representative of those used for WMA. Results indicated that gradation and binder lubricity contributed significantly to mixture workability at conditions of lower temperature, lower density, or both. The effects of viscosity were found to be insignificant. Aggregate gradation was found to be the most influential factor, which indicated that, for some mixes, use of WMA additives was not always necessary to improve laboratory compaction. To support selection of compaction temperatures on the basis of binder properties, a method was presented to apply the asphalt lubricity test to estimate minimum WMA compaction temperatures.

01500961

13-4332

English

pp 87–95

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309286947

Print

Figures (6) ; References (12) ; Tables (2)

Aggregate gradation; Bituminous binders; Compactibility; Lubricants; Temperature endurance tests; Viscosity; Warm mix paving mixtures; Workability

Lubricity

Highways; Materials; Pavements; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Feb 5 2013 12:50PM

• Assessment of Warm-Mix Asphalt for Heavy Traffic Airfields
• Effects of Changing Virgin Binder Grade and Content on High Reclaimed Asphalt Pavement Mixture Properties
• Evaluation of Environmental Susceptibility of Bituminous Mastic Viscosity as a Function of Mineral and Biomass Fillers
• Forensic Study on the Cracking of New Jersey’s Long-Term Pavement Performance Specific Pavement Study Sections
• Influence of Hydrogreen Bioasphalt on Viscoelastic Properties of Reclaimed Asphalt Mixtures
• Laboratory Evaluation of Asphalt Mixtures That Contain Biobinder Technologies
• Long-Term Performance of Pavement with High Recycled Asphalt Content: Case Studies
• Low-Temperature Performance Characterization of Biomodified Asphalt Mixtures That Contain Reclaimed Asphalt Pavement
• Modeling of the Resilient Modulus for Recycled Asphalt Pavement Applications in Base Course Layers
• Moisture Damage Evaluation of Asphalt Mixes That Contain Mining Byproducts: Results from Traditional and Fracture Energy Tests
• Performance Characterization of Asphalt Mixtures at High Asphalt Binder Replacement with Recycled Asphalt Shingles
• Performance Enhancement of Crumb Rubber–Modified Asphalts Through Control of the Developed Internal Network Structure
• Reacted and Activated Rubber: Elastomeric Asphalt Extender